{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2001:GV6NBDXO6KHKRA4XH4J2K75IEN","short_pith_number":"pith:GV6NBDXO","schema_version":"1.0","canonical_sha256":"357cd08eeef28ea883973f13a57fa823577c383a0f70f39a78311645391aabed","source":{"kind":"arxiv","id":"astro-ph/0109013","version":1},"attestation_state":"computed","paper":{"title":"Dust Absorption and the Cosmic UV Flux Density","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Buzzoni (TNG, A. Iovino (Oss. Astron. Brera), M. Massarotti (Oss. Astron. Capodimonte), Oss. Astron. Brera)","submitted_at":"2001-09-03T08:28:41Z","abstract_excerpt":"We study the evolution of the galaxy UV luminosity density as a function of redshift in the Hubble Deep Field North (HDF-N). We estimate the amount of energy absorbed by dust and hidden from optical observations by analyzing the HDF-N photometric data with the spectral energy distribution fitting method. According to our results, at redshifts 1 < z < 4.5, the global energy observed in the UV rest-frame at lambda=1500 A corresponds to only 7-11% of the stellar energy output, the rest of it being absorbed by dust and re-emitted in the far-IR. Our estimates of the comoving star formation rate den"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"astro-ph/0109013","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-09-03T08:28:41Z","cross_cats_sorted":[],"title_canon_sha256":"db7567b2da575f623c07c7698b523f1cc431386b6a4a422c1769099d4ca0d1df","abstract_canon_sha256":"a3339ef3dc502a893f577c62587f82ae9b08ddd51e156fd64db44e6a3d3f6753"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:45.552839Z","signature_b64":"Itak5mqfkP9s1hOyEl30kXrxY2JE0fP+LPJTV4ayGO9gbkuXeTcYuAvCIs8hKFX+vBRqU1eh5kxRfZbzgMLCBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"357cd08eeef28ea883973f13a57fa823577c383a0f70f39a78311645391aabed","last_reissued_at":"2026-05-18T01:07:45.552436Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:45.552436Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Dust Absorption and the Cosmic UV Flux Density","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Buzzoni (TNG, A. Iovino (Oss. Astron. Brera), M. Massarotti (Oss. Astron. Capodimonte), Oss. Astron. Brera)","submitted_at":"2001-09-03T08:28:41Z","abstract_excerpt":"We study the evolution of the galaxy UV luminosity density as a function of redshift in the Hubble Deep Field North (HDF-N). We estimate the amount of energy absorbed by dust and hidden from optical observations by analyzing the HDF-N photometric data with the spectral energy distribution fitting method. According to our results, at redshifts 1 < z < 4.5, the global energy observed in the UV rest-frame at lambda=1500 A corresponds to only 7-11% of the stellar energy output, the rest of it being absorbed by dust and re-emitted in the far-IR. Our estimates of the comoving star formation rate den"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0109013","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0109013","created_at":"2026-05-18T01:07:45.552495+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0109013v1","created_at":"2026-05-18T01:07:45.552495+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0109013","created_at":"2026-05-18T01:07:45.552495+00:00"},{"alias_kind":"pith_short_12","alias_value":"GV6NBDXO6KHK","created_at":"2026-05-18T12:25:50.254431+00:00"},{"alias_kind":"pith_short_16","alias_value":"GV6NBDXO6KHKRA4X","created_at":"2026-05-18T12:25:50.254431+00:00"},{"alias_kind":"pith_short_8","alias_value":"GV6NBDXO","created_at":"2026-05-18T12:25:50.254431+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/GV6NBDXO6KHKRA4XH4J2K75IEN","json":"https://pith.science/pith/GV6NBDXO6KHKRA4XH4J2K75IEN.json","graph_json":"https://pith.science/api/pith-number/GV6NBDXO6KHKRA4XH4J2K75IEN/graph.json","events_json":"https://pith.science/api/pith-number/GV6NBDXO6KHKRA4XH4J2K75IEN/events.json","paper":"https://pith.science/paper/GV6NBDXO"},"agent_actions":{"view_html":"https://pith.science/pith/GV6NBDXO6KHKRA4XH4J2K75IEN","download_json":"https://pith.science/pith/GV6NBDXO6KHKRA4XH4J2K75IEN.json","view_paper":"https://pith.science/paper/GV6NBDXO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0109013&json=true","fetch_graph":"https://pith.science/api/pith-number/GV6NBDXO6KHKRA4XH4J2K75IEN/graph.json","fetch_events":"https://pith.science/api/pith-number/GV6NBDXO6KHKRA4XH4J2K75IEN/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GV6NBDXO6KHKRA4XH4J2K75IEN/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GV6NBDXO6KHKRA4XH4J2K75IEN/action/storage_attestation","attest_author":"https://pith.science/pith/GV6NBDXO6KHKRA4XH4J2K75IEN/action/author_attestation","sign_citation":"https://pith.science/pith/GV6NBDXO6KHKRA4XH4J2K75IEN/action/citation_signature","submit_replication":"https://pith.science/pith/GV6NBDXO6KHKRA4XH4J2K75IEN/action/replication_record"}},"created_at":"2026-05-18T01:07:45.552495+00:00","updated_at":"2026-05-18T01:07:45.552495+00:00"}